Classification



Soil Classification  
The joint action of the factors that influence the formation and evolution of the soil leads to the development of different profiles or soil types. The same classification can be based on various criteria. Among others, we can cite:
 * Intrinsic soil characteristics, dependent on the genetic processes that develop them.
  
 * Soil properties such as permeability, salinity, composition, ... and that are closely related to training factors.
     
* Depending on your aptitude for different uses, mainly agricultural.  
It is common to perform a first grouping based on the predominant factor or factors in their development. Thus, we distinguish between:

    * Soil azonal: they correspond to immature soils, found in the early stages of development for not acting edafogenticos factors for long enough (aclimácicos), in which the characters are predominant due to the type of bedrock. Are present for example on recent sediments (allochthonous), deserts, frozen ground.
   
 * Soil Intrazonal: are conducted under conditions in which factors predominate edafogenéticos liabilities, such as bedrock, slope, human action ... These soils are acclimated, as the weather is a determining factor in their formation, and (climax).
   
 * Soil zones: developed under the action of the active factors of soil formation, especially the weather, for long enough. They are, therefore, climax and climate. It is mature and well-evolved soil.

Source: http://www.monografias.com/trabajos33/suelos/suelos.shtml#criter